Duplex air-pump for carbureting or gas machines and the like.



A. GRANDJEAN. DUPLEX AIR PUMP FOR CAHBURETING 0R GAS MACHINES AND THE LIKE.

APPLICATION FILED SEPT. I7. i913.

' Patented Sept. 24,1918.

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A. GRANDIEAN.

DUPIEX AIR PUMP FOR CARBURETING 0R GAS MACHINES AND THE I IKE. APPLICATION FILED SEPT. I1, Isla.

'llflllllznvlll//Zii m Invewor- .zzesses I and lighting purposes.

UNrTED srn'rns Param QFFIQE ARTHR GBANDJEAN, oF SANDinero,` CALIFQRNI. I

DUPLEx'vAm-rmvrr ron c ARBuRETINe on :Gas ylirAcHINEs' AND THE LIKE.

To .all 'whom t may concern.'

l Be it known that I, ARTHUR GRANDJEAN, a citizen `of theUnited States, residing at San Diego, in thecounty of San. Diego and State. of- California, have invented a new anduseful'Duplex Air-Pump for Carburet ing or GasMachines and the like, of which the following is a specication.

Thisinvention relates to an iair pump for apparatus-applicable 'for use as Ya domestic gas machine in which hydrocarbons,` such as asolene, alcohol or other highly inflammale liquids are evaporated by-y air under pressure, for .the purposeot supplying gas pipes of lighting and heating systems with a combustible fluid that may. be used at the gas burnersof the system for both heating An object of this inventionA is lto provide an air pump for apparatus of thisA character by which a uniform pressure of carbureted -air :will always be maintained at the burners without fluctuations andwhich will produce-a practically permanent, uni- ;form. and stable burning fluid that. is of the nature of adry gasinotliable te lose its carbon by condensation while standing inl the pipes during nonuse of the burners.

Further .objects are maximum capacity, minimum siz e,-superior` compactness, minimum number of parts, cheapnessof manufacture, certainty ofautomatic action, and perfect regulation ofuel.v I

Other objects and advantages may appear from the subjoined detaihdescripticn.;

'The accompanying drawingsillustrate the invention.' i

Figure 1 isa plan yview of a earbureting apparatus employingV a duplex pump, constructed inaccordance with this invention,

-the ligure being .partly in section on line l, Fig.s.-... Y

Fig. 2 is an elevation of, 'the yapp aratus shown in Figi, .partly Vin Vmidsection andv VviewedV from thefront of Figl. Y l

Fig. 3 delivery valve online 503,.-Figs; and 4. Fig. 4 is av section at the airj delivery ,valve on lineari, Figs.. 1 andV Fig. lisa plan of one ofthern tor valves detached.y l

fFig.l 6 is ,avertical section; ofthe motor vvalves in the axialplaneof thevalve. steinfr .Workin in a.- cylinder 21"forment as the4 '-7. z f Online we. Figs.r .11, 2, 5 and@ the pasaba-1 ing in the positief@ .Shown .1 at', .the elette in* iQulh-aledgtrnsverscly ofthe stem. redhead :1.1.0 1

Application led September 17, 1913. Serial N o. 790,375.

is `a kvertical section ofV theai'r.

I Specification of Letters Patent. Patgntd Sept, 24, i918.

Figs. `1 Yand -2. The ,valve stem and the valves are shownfintact. l Fig. 7 isa ind-section ronline 7,Fig."`1, fand 6.7` i

In Figs. 5, 6 and', the parts ares-inthe position shown at the left in' Figs. 1 and 2.

Arrows.l on the section -lines lindicate the direction ofV sight.

. .Like characters are applied to theisame-V parts in the Vvarious viewsand where the parts are duplicated distinguishing indexes` are added `to avoid confusion, but these are not invariably Vnoticed in the verbal description. I

In carrying out this inventionlprovision maybe made lfor' operating the` airV pumps lloy anyV motive power, as kelectricity or? air or water under pressure, and in the .accompanying drawings the: apparatus' willV be show n asV operated by water; that being sufiicient for an'runderstandingof thisinvention. 1. Y.

f Each of the reciprocalbell type air pumps l', 2, to supply air tothe carbureter 3, comprises a tank 4, a bell element or receiver 5. working up and down, and each pump is provided with an air inlet' communicating with any suitable source of atmospheric air,

anoutlet 7 communicating (through means hereinafter described) with the carbureter 3,and a piston motor, comprisinga vertical cylinder 8 iXed to' the tank, and a piston 9 therein having a rod 10 connectedto the bell 5 to raise said bell when .water isadmitted to the motor, throughthe pipe 11 .which is; .controlled 1 by the over-balancing .threefway--motor valve 12. .Y

Y In the drawingsthe elementsfpertaining to the air pumps, respectively, are marked 'with like reference characters, those applied i to'lone air. pumpV being distinguished V.by

Ymeans of an index from i'those .applied'to the V'other air pump. y Y Between thev air pumps vided'thefoverbalancing air. ldelivery .valve 13 .whichv has Vtwo inlets 14", 714'?, and a Vsingle eutlet'through Vairspipe 15. VThe in- .letsgare providedwith valveseats 1.6,;16

.two shoulders in the forni of collars 19, 2O

headlo a A'I', in vthe .stern22 offwhich. gT is s '(seeFigs. Sand that are respetetively con- Vgtrolled bythe valve plugs 17, 1.1- whieh; are r fixedto a valvestein 1-8 thatis .provided with ego of said T' a'rockishaft 23, `an farm 24 of which extends between the shoulders 19, 20, so that as the rock-shaft is lopera/ted the valve stem and theva'lves are shifted, first in one and then in the other direction lengthwise of the T-head.

The stemv 22 of the valve case forming T is providedI with journal bearings 25, 26', formed integral therewith, one beingfblind and supported by an external boss 27, and the otherfbeing formed in a threaded tubular projection on which is'scre'wed a gland 28g-there" being packing 29 inside the 'gland and around the rock-shaft 23 to prevent leakage Said rock-shaft 23 has av cylindrical portioninserted through the bearing 26' and through the rock-shaft arm 221 which is bored to receive it, and beyond said arm and into'thefbearing 25. One or more set screws 30 screwed through the arm 24: serve to fix saidarln on the rock-shaft and the projections 24'prevent endwise movements of the rock-shaft- The valve case forming T stem'22'is con-V nected by a union 32 with the air pipe 15 which leads upward toy the carbureter through'air delivery pipe 31, is provided with' -a cheek valve 33 and is connected'with the inlet/34: for' g'asolenel or other hydrocarbon or'other liquidffuel to be v'olatilized, and with the carbureter 3. The check valve 33-servesto` prevent the return of the carbureted air from pipe 31'to the air in the air pipe 15 and also avoids the liability of any escape of carbureted air from. the apparatus in ease the air supply valves 35 might; leak. rllhe valve 13 and the parts operating it constitute means to deliver air from the pumps alternately into the air pipe.

The rock-shaft 23 is provided on its outer portion with an arm 36 adjustably fixed thereto by a set screw 37 and there is journaled on said rock-shaft' a lever 38 which is provided on opposite sides of the rock-shaft arm 36 with operatinglugs 39, 39 and is also provided centrally with an over-balancing weight 40; and on opposite sides 0f thcrek-shaft and weight with two arms 42, 42 to which are pivota'lly connected operating ba-rs 43', 43 provided with buttons 44, 114. arranged to be pushedv downwardly by the air delivery tappet's 15, 45 that are carried by the weighted bells 5, 5". The carburetor' 3 receivingV air from .the airpipe 15 isconneeted by 'the earbureted' air4 outlet pipe 46' leading ,from the top thereof, with a storage tank 47fromA which the service'v pipe'o" Y Y The buttons/44, are'""adrjustably and mrset celia-re bei) that? they te propeily positioned on aridwill yieldingly slide andboth bells d'escendat the. same time the bells will be resiliently cheeked and willV come to rest without y jar.

Each` bell is loaded with a weight c to force out the air with appropriate pressure.

The motor valves 12, 12" are alike and each comprises an L T and base-formed integrally; the L member 49 being above and the basei50being'below the T proper. Said L member extends at right angles to the barrel 51 of the T, isscrew-threaded at its outer' end andl vi's'provided withI a bushing 52, which serves as af-support for'y aroekshaft53havi-ng an arm l5ll'at'its inner end toi extend between and act on valve shifting lugs'inE the form of collars 55 that are fixed tothe valve'stem 'whieh is provided atiits ends with valvef plugs 58 that alternately close-valve seats 59 atthe' ends of the barrel 51' a'sthe valve stern' is shifted byy said armV 54'of the rock-shaft.

The tubular stem'GO of the L Tf'communicates with said barrel intermediate said valve"seats.59 and also communicates with the motor vcylinder 8 through pipe 11; and the open ends of the barrelfcommun'icate respectively 4with the supply andI exhaust pipes 61, 62 for the water or other motive liquid' to raisethe bells.

A gland V63 is screwed onto the'threaded end of the L limb ofthe L T and confines packing 64 therein to prevent leakage around the motor valve rock-shaft 53 which is provided with'an' arm'65 adjustably iix'ed on saidA rock-shaft by' a set-'screw 66; and a weighted lever' 67 provided with side arms @Sand lugs 69 spaced apart'to act'alternately on the rock-shaft arm is journaled'on'the rock-shaft, and'is'provided with an arm 70 having an over-balancing' weight 701'` and extending in the same vertical plane with one of the side arms GS'and connected with the motor valve link 71 that slides through the tappet 72`which is lixedto the bell 5; said link having two buttons V73, 7-1 respectively abeve andbelow the tappet' to shift the weighted arm from side to side ofthe rock-shaft, thus to operate the valve 12 to open the waterV supply port andV close the water exhaust port near-the end of the descent of the bell and to close said supply giio port and open said exhaust portat the end to which'its motor appertains at the close of both its rise and falland the air valve is operated by bells alternately and `only at the closeof the down motion thereof; the expiration of both' pumps being controlled" by operation of the' respective pumps alternately. Y Y

Itis j'unde`rst )"od thatit is not' new to operatethe valvesof domestiegas machines rodsconnected'with the valves andlhaving buttons actedVIK orbyfa' t'ap'peti carried by i Veach motor valve is voperated Vonly by the bell f Y "driven by the mot-or which such valve oon-2' trols, the air delivery' valve is operated by ?{both bel-ls', `the actuating movement occur- *ring at the close only of Vthe descentofeaeh I bell and being effective to. close the air 'outi l0 letti-'oni such descending bell and Yto open "theair outlet from yits mate, the other! bell,

Ato the air delivery-pipe l5.

The motor -pushbuaons 7a, Menthe m0- toi-valve vlinks 71, 71 are arranged in such and the" air delivery push buttons 1 -1,447.

frelationto the tappets 72,' 7 2 respectively,

A fon valve bars 43,Y 43, respectively, arelo- Y cate'dfwith such relation1 totheair delivery AAtappets 1-5, 45, respectively, and their bells 5, o and the other parts ot` the apparatus Y that the opening of themotorvalveand the Y. closing ofthe air .v-alve'for anyi'airpumpfrA Y is effected While thebell of such pump isv resting on the aerialcontents ofthe'V pumps; Y

and oon'sequentlythe airpressure exerted,`

' by 'either bell o nthe air Vin the puinpto whichv it pertain'slis not relieved until pres-i. fsure Vis applied! by-its mate, the otherfbell,"VY

' on the air in the-other pump. i Y

In this respect the buttons when depressed are mounted near the level at Whichthe tapi "pets come to 'rest When the bell is dovvn and the length of the side arms 42,42 and 70,Y

70 'is sufficient tof'inove Vthe buttons from" up to a position abovesueh level; Y For convenience 1n' describing the operar..

theirl depressed position belovv such level,"

Vtionybell land the parts pertaining,"theretol tivelv. i.

may be termed therst-bel-l and partszjrespeetiv'elyg-and bell 2 andvitsparts maybe 'The practical operati on of the .fair ,puni-p# Y ing' Aportion of the 4apparatus may lie-under-A stoodbyreferencelto vI `igg2 in which the Vfirst bell 5 is shoivnljust begnningto` de.

i ',*scend andthe second-bell 5 is shown Yjust-f "sojtl1`at sediment ldepositsinthe 'tanksean beginning to'rise. `ff1f 'Y Y Y This..conditionfhasbeen 1 petsV 15 and 72" uponethe buttonsrespec--f actionV just previously YKdescribed* of the'taptively7V 411i and ft." which cause the -overf [balancing levers 38 and-67 "1 :With their VrefY`- 12V toopen the Way forjair from bell 5 to air pipel and for motive liquid from the service main through pipes 61"-iand 11 tori drive the motor pisto'n9, Ythus? lifting thelF'Ying theigasfol'ene supply valve andholding it Y f penffor a' determinedYperiodf'during each-"11152 125 Vstrokefor. inspiration oteachpuinp, and also Y air deliveryv valve 13 andthe motor valve bell y5 for inspiration"ofpump2during a@ period of the descent of bell 5 and until the' ing the overbalaneing ilever 67Y7` iand'fitsl 51" Weight' 7 01 to overbalaneing position, thus i reached the-Y"v descend except 'thattheV air deliveryV -va-lve fined under the pressure'exertedbythe vbell 11 'Y and opening*the-passagerornpipe 117 l to Ythe pipe 62, sothat thef-belll is free toV 13 iselosed: so thatthe air in pump 2 iscon- 70 This is the-relationin which the-different partsofthe apparatusjr'emain during Y pets 45-and 72 act yupon thebuttons- M' and 7 4C respectively,"therebyoperating the valves;

1 3 and l2'tozopen'afvvayrfor the airfrom bell 5 to Vair Ydelivery''pil'oe -la'nd'cutting ofthe Way for theair from bellj-todelivery. pipe 15,'rand' turning on v vat'er through pipes l''and 11 to lthe motor v9 and vcutting Y off the` passage from pipe 11S to the exhaust the otheris practically instantaneous. f ,Y

pipe .62, By this actionthe air isallovved'to f flow' troni` punip4 2 vto'V the earbureter and pump 1 '2'is"v started onv its inspiration -jvvhich Theair Asupply valvedescribed herein` is Y -claimed in myeopending 'applieationSerial No. '7790,374, Yjiled Sept. 17, 1913,` patented I Mar; 2 8, 1916, No. 1,177,100.

The exhaust Water Vi'rorn'the fmotor Hows through the exhaust pipe 62i`nto the interior otthetank 4;; said exhaust pipe-there extending upward asa Ystand-pipe- 75V toa'level above "the "overflow, port 76 which v.opens Y through ythe Wall of vtank 24,' belo'vv the'level ofthe mouths ofthe air'supply and air delivery pipes.*Tl1e overflow pipe 77 provided with the venting 'F1771 andYleadingto the drain pipe 78 isconneetedto the .port'76, s0 Ytern'ied Ythe Vsecond belljand parts Yrespec-,jthatthefvvater seal insidethe tank Vandjb'ell "-isreplenished by theexhaust from the motor 1 andis kept ata constant level ;below. the tops ofthe pipes 6V and 7. Y

bottom eftheftaksfimo thedfainfpipesvs bedravvnfol". .Y 1

Thel carbonaeeous A or Y"other inflammable liquid which is to charge the pumped air is earbureterjpipe 3 1 through the ga solenesup-l p lyvalve 82 Av'vhic'hlfis normally'closed by I pressure of lever- 83' Y that Yris pivoted on .theyA "post 8 4 and lonthe valve stem' 8 5' on fvvhih'it- I is held'gdow'nrby suitable ineans as theaveight 186. As Y af'description 'of'themeans for openfpheffaeans fdr 'eisingthevaiveYs names.. Y sary Yfor'Ythe understanding of thepuinp con'- Y struetionf by anyone skilled. in I'the art and as' sugli; means Ymayfbearrarigedin vaousf lThe'washout'valves 79,279 Open-'frena` the filo i v stored in thefgasolen'e supply tank 80 and" 2136Vir i Ways according to the judgment ofthe conf structor, `they areindicated in the-drawings Without ,having reference characters applied thereto, simply in order to show only' in a general way how they may be connected With the pump structure.

VBy this meansthe attendant can adjust the apparatus to supply Aalmost exactly the amount of liquid required to properly carburet theair sothat rthe eXcess ofliquid suppliedto the air t produce a burning fluid or gas of the required richness will be mini- 4It is thus made possible to cause the air to absorb all the constituents necessary to produce a gaseous fuel high in B. T.. U. and

practically non-condensible under the condi-A tions usually prevailing in the pipes and `With the interior of the gasolene tank 80.

fpheric pressure.

The pipe 81 leads frointhe gasolene tank through the valve 115.

The venting T 771on the overflow pipe 77 vallows the overflow from thetank 4, to iiovv out easily Without obstruction from atmoslt is to be noted that the pumps arernot united in operation but that each one operates toforce the air through the carbureter to the storage tank. independently of the pendently of each-other bythe action of the Water valve mechanism at each pump. VBy this apparatus or lsystemthe need lof high gravity fuel is overcome as I am Vmaking gas by using fuel as low as 58o4 Baume thereby making a safe gas for all purposes. By

this system one .air pump can operate alone andthe other one remain at rest` and When more gas 1s needed the three-Way air valve 1s regulatedor adjusted to operate both pumps 1.The combination of tanks; bells in they Vtanks respectively; motors t0 raise the bells operable independently of each other re spectively; means controlled by the. bellsrel vspectively to turn-on and off the -motive Y power at the close of the descent and ascent bells respective y; an ,air pipe; a three-Way valve vfior alternatelv connecting the, out-Y air pump.

Y other,that is to say, both .pumps Work inde- Y of said bells respectively;-valvedair inlets f for the bells res ec'tively; air outlets for the lets V,Withgthe airpipe; lan air delivery pipe connected to the air pipe; a check valvebetweenthe air -pipe and the air delivery pipe;

and means operated by the movement vof the bells to open one of the outlets and to close the other, and vice versa.

V2. The combination of tanks; bells in the tanks respectively; motors to raise the bells operable independently of each other` respectively; means controlled by the bells respectively to turn on and olf the motive power at the closeof thedescent and ascent ofsaid bells respectively; air outlets for the bells respectively; an air pipe; a three-Way valve for alternately Connecting the. outlets Withtheair pipe; means operated by the descent of one of thebells tol close its outlet Vand to open the outlet from the other bell; land means operated by 'the descent of the vsecond bell toy closeY its outlet and to open the outlet from the lirst bell.

,3. VTvvo air pumps of the bell type having n bells that are operable independently of each other; 'motors tol lift the pump bells respectively to cause inspiration of air thereinto; lan air pipe; a three-'Way valve connected with fthe air pipe and With the,` pumpsg'means operated by ,the bells alter-V nately to operate the three-Way valve and thereby control the expiration of air from such pipes; means operated by one of the air pumps-to control the motor for such pump, and means operated by the second to control the motor ofthe second air pump.

'of tWo tanks, an independent piston motor in eachftank,*a Waterv connection to each piston motor, bells in the tanks and connected to the piston motors, independent means for` each bell whereby 'the Water is turned on and olf at the close of the descent and ascent of fthe bells, an air Outlet Jfor each bell, an air c pipe, a three-Way valve for alternately connecting the outlets With vthe air pipe, means .operated by the descent of one of the bells to .operate the three-Way valve to closethe Y Y 4. In adupleX-fair pump, the combination outlet of that bell and openthe outlet of the other bell, and 'means operated by Ithe descent of the other bell to operate the threeway valve to close the outlet of the second bell and open the' outlet of the first bell. Y

In testimony whereof I have hereunto set my hand at San Diego, California, this'lOth day of Sept.1913. Y i

ARTHUR ennunimiu.v

kAn presence of@- EARL E."EMnRY, Y

E. CRANE.

. YV(lopipes of this patent may be obtainedlforve cents each, byaddressngthe Commissioner Vnal' Iatents,

wasmngtonmc. 

